---
title: "CVE-2015-5352\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2015-5352?format=md
keywords: index, follow
---

# CVE-2015-5352

Publication date 2 August 2015

Last updated 24 July 2024

---

Ubuntu priority

**Low**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

The x11\_open\_helper function in channels.c in ssh in OpenSSH before 6.9,
when ForwardX11Trusted mode is not used, lacks a check of the refusal
deadline for X connections, which makes it easier for remote attackers to
bypass intended access restrictions via a connection outside of the
permitted time window.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openssh | 15.04 vivid | Fixed 1:6.7p1-5ubuntu1.2 |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 1:6.6p1-2ubuntu2.2 |
| 12.04 LTS precise | Fixed 1:5.9p1-5ubuntu1.6 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2015-5352?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| openssh | * Upstream:   [?h=V\_6\_](https://anongit.mindrot.org/openssh.git/commit/?h=V_6_9&id=1bf477d3cdf1a864646d59820878783d42357a1d) * Upstream:   [1bf477d](https://github.com/openssh/openssh-portable/commit/1bf477d3cdf1a864646d59820878783d42357a1d) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5352)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-5352)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-5352)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-5352)

### Related Ubuntu Security Notices (USN)

+ [USN-2710-1](https://usn.ubuntu.com/USN-2710-1)
+ OpenSSH vulnerabilities
+ 14 August 2015

### Other references

* <http://www.openwall.com/lists/oss-security/2015/07/01/7>
* <https://thejh.net/written-stuff/openssh-6.8-xsecurity>
* <https://www.cve.org/CVERecord?id=CVE-2015-5352>